Advanced research on architectonics and materials : by Helen Zhang; David Jin

By Helen Zhang; David Jin

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First, the pitch-row has been twice the original pitch-row and a diameter of hole when punching, owing to the pitch-row increasing, the die strength has increased correspondingly and the mould service life has increased. Second, the holes being punched evenly distributed in the whole parts rather than locally distributed in the parts, if complemented with elastic pressure feeding devices, flatness requirement can be well guaranteed and the holes can against deformation. Adopting this method,progressive die can be used for small parts and four single die for large parts, it seems that the cost of the mould has increased using this method,but because of die service life’s increasing, the cost of the mould spreading every workpiece has reduced instead.

Generally, about 40% of sulphide is removed by bulk flotation before gravity concentration, which reduces the feed amount of gravity separation. The bulk concentrate is separated by flotation to obtain the marketable copper and pyrite concentrates. The bulk flotation has been proven to be the best stage before gravity concentration due to its low consumption of reagents. 6%. Fig. 1 Principle flowsheet of Datun concentrator 30 Advanced Research on Architectonics and Materials Case Two: Gravity Separation-Flotation in Dachang Region Changpo tin deposit is of fine vein cassiterite polymetallic sulphide ore.

The oversize accounts for 60% of the total tailings with moisture of 15%, and the cake is produced by the filters with moisture of 20%. Then the oversize (dry material A) and the dry cake (dry material B) can easily be transported to the stock pile. The water from thickener and the filters is transparent, which can be reused or discharged according the GB-25466-2010 national standards. 2. 074mm, there is a similarity between them. Therefore, this process promises to be a good reference for the Aba tailings disposal in forthcoming program.

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